fix(web): keep the composer strip for a non-Git project's capacity reading

[rynfar]

On a project with no Git repository, the composer's context strip disappears
while the composer is at full size, taking the provider capacity readout with
it. Collapsing the composer brings both back, so the gauge looks like it is
flickering on scroll.

The strip is hidden by shouldShowComposerContextStrip, which asks whether
there is any reason to keep it open: a repository, an environment worth
picking, or the composer's resting controls relocated into it. On a non-Git
project with one environment the first two are false, and the third follows the
composer's resting state — so a full-size composer leaves nothing holding the
strip open. The capacity readout is the one thing in the strip that belongs to
the account rather than the workspace, and it was never counted, so a strip with
a live reading in it was still treated as empty.

Capacity now counts as content, the same way the environment indicator was added
in 9bda807 for the same collapse. The strip still collapses when it genuinely
has nothing to say, including when the capacity setting is off.

Measured on a real Codex sign-in in a non-Git project, on the strip element:

	visibility	position / top	rendered text
before	hidden	absolute / 764 (below an 800px viewport)	(none)
after	visible	relative / 732	Codex 65% 5d 11h

The text was present in textContent before the fix too — it was rendered the
whole time inside a hidden container.

No before/after images: the in-app browser returned "Preview snapshot failed"
on every capture attempt with the panel visible, so the DOM measurements above
stand in. Happy to add images if the capture path starts working.

Written by Claude Opus 5 in Claude Code.

---

^{Need help on this PR? Tag @codesmith-bot with what you need. Autofix is disabled.}

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.8 KiB	13.7 KiB	−177 B (−1.2%)	15.1 KiB	✅
Codex	Thread snapshot wire	7.1 KiB	7.1 KiB	−4 B (−0.1%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.7 KiB	6.6 KiB	−173 B (−2.5%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	57.4 KiB	56.5 KiB	−910 B (−1.5%)	66.4 KiB	✅
Codex	Live turn messages	10	8	−2 (−20.0%)	21	✅
Claude	Total thread wire	13.8 KiB	13.7 KiB	−132 B (−0.9%)	15.1 KiB	✅
Claude	Thread snapshot wire	7.1 KiB	7.1 KiB	−10 B (−0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.7 KiB	6.6 KiB	−122 B (−1.8%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	58.2 KiB	57.3 KiB	−884 B (−1.5%)	66.4 KiB	✅
Claude	Live turn messages	9	8	−1 (−11.1%)	21	✅

Baseline: f669dcd · PR result: 4b7a11f · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 111.2 KiB
• Claude decoded thread snapshot: 111.9 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.